This is the main riff. Repeat it as needed.
E|--------------|---------------------|---------0---------|---------0------||
H|----0-0-00-000|---------------------|-------0-0---------|-------0-0------||
G|----0-0-00-000|------4-4-44---------|-----1-1-1---------|-----1-1-1------||
D|----0-0-00-000|------4-4-44-----0-2-|-----2-2-2-----0-2-|-----2-2-2-----0||
A|--------------|-/2-2-2-2-22-0-2-----|-----2-2---0-2-----|-----2-2---0-2--||
E|3-3-----------|---------------------|-0-0---------------|-0-0------------||